Question

Is this possible to name the nodes of a Treeview control something like Matrix?

For Example:

Parent Node
   --> Child Node
       --> Grand child node
Other Parent Node

To (Something like this)

-- Node1
   --> Node11
       --> Node111
       --> Node112
         --> Node1121
   --> Node12
   --> Node13
-- Node2

I am adding the nodes and child nodes by Button click btnAddNode and btnAddChildNode

Now I am just incrementing a counter value which is not catching whether the node is child or parent (just incrementing)

Answer 1

The simplest solution is using these two simple methods. First is adding TreeNodes to the TreeView control and the second adds the child nodes to the already added nodes.

public void AddNode(TreeView parent, string text)
{
    if (parent != null)
    {
         parent.Nodes.Add(new TreeNode(text + (parent.Nodes.Count + 1).ToString()));
    }
}
public void AddChildNode(TreeNode parent)
{
    if(parent != null)
    {
         string number = parent.Text;
         parent.Nodes.Add(new TreeNode(number + (parent.Nodes.Count + 1).ToString()));   
    }
}

And to check if it’s working you can do something like this:

AddNode(treeView1, "Node");
AddNode(treeView1, "Node");
AddNode(treeView1, "Node");
AddChildNode(treeView1.Nodes[0]);
AddChildNode(treeView1.Nodes[0]);
AddChildNode(treeView1.Nodes[0]);
AddChildNode(treeView1.Nodes[1]);
AddChildNode(treeView1.Nodes[2]);
AddChildNode(treeView1.Nodes[2]);